US20220322541A1 - Electronic control device - Google Patents
Electronic control device Download PDFInfo
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- US20220322541A1 US20220322541A1 US17/365,455 US202117365455A US2022322541A1 US 20220322541 A1 US20220322541 A1 US 20220322541A1 US 202117365455 A US202117365455 A US 202117365455A US 2022322541 A1 US2022322541 A1 US 2022322541A1
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- United States
- Prior art keywords
- control device
- electronic control
- circuit board
- case
- electronic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 210000000078 claw Anatomy 0.000 claims abstract description 55
- 239000000853 adhesive Substances 0.000 claims abstract description 29
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
- H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
- H05K5/006—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by features for holding the PCB within the housing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
- H05K5/0069—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having connector relating features for connecting the connector pins with the PCB or for mounting the connector body with the housing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/062—Hermetically-sealed casings sealed by a material injected between a non-removable cover and a body, e.g. hardening in situ
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1405—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by clips or resilient members, e.g. hooks
Definitions
- the present application relates to an electronic control device.
- An electronic control device used for control of a vehicle and the like is of a structure in which electronic components, such as an input and/or output circuit, a communication circuit, a microcomputer, and a power source circuit, are generally arranged on a printed board serving as an electronic circuit board, connectors for being connected to external devices are placed on the printed board, and this printed board is contained in a housing.
- this electronic control device there is known one in which the printed board is sandwiched by means of a base and a cover, which are separated above and below, and the butt surfaces of the base and the cover are bonded by waterproof sealant and the like.
- the former screw-fastening method can secure high vibration resistance as the device by rigidly connecting the printed board to the housing with screws
- the screw holes need to be provided in the housing and thus it becomes expensive.
- the present application is to disclose a technique for solving the problem mentioned above and is to provide an electronic control device capable of surely fixing an electronic circuit board and improving vibration resistance.
- An electronic control device disclosed in the present application is an electronic control device which includes: an electronic circuit board on which an electronic component is packaged; and a housing in which the electronic circuit board is contained, and which is composed of a case and a base.
- the electronic control device includes: a plurality of claws which is provided on the case of the housing and fixes the electronic circuit board; a fixing groove which is formed in the case on the rear side of the claws, and into which a peripheral edge portion of the base is close-fitted; a cutout which is formed on the rear side of the claws of the housing and is communicated with the fixing groove; and adhesive which is filled on the rear side of the claws via the fixing groove and the cutout.
- the electronic circuit board can be surely fixed by the plurality of claws and vibration resistance can be improved.
- FIG. 1 is a perspective view showing an electronic control device according to a preferred embodiment 1;
- FIG. 2 is an exploded perspective view showing the electronic control device according to the embodiment 1;
- FIG. 3 is a perspective view showing a part A of FIG. 2 in the electronic control device according to the embodiment 1;
- FIG. 4 is a relevant part sectional view showing the electronic control device according to the embodiment 1;
- FIG. 5 is a relevant part sectional view showing an electronic control device according to a preferred embodiment 2;
- FIG. 6 is a perspective view showing a case in an electronic control device according to a preferred embodiment 3.
- FIG. 7 is a relevant part sectional view showing the electronic control device according to the embodiment 3.
- FIG. 1 is a perspective view showing an electronic control device according to the embodiment 1.
- FIG. 2 is an exploded perspective view showing the electronic control device according to the embodiment 1.
- FIG. 3 is a perspective view showing a part A of FIG. 2 in the electronic control device according to the embodiment 1.
- FIG. 4 is a relevant part sectional view showing the electronic control device according to the embodiment 1.
- An electronic control device 100 is mounted on, for example, an engine of an engine room.
- a housing 1 is composed of a case 2 and a base 3 and is of an upper and lower separation type.
- the case 2 of the housing 1 is composed of a case base body 2 a, a case frame body 2 b, and a board mounting portion 2 c.
- the case 2 is formed of, for example, polybutylene terephthalate (PBT) resin; and the base 3 is formed of, for example, aluminum, stainless steel, and PBT resin.
- PBT polybutylene terephthalate
- An electronic component 5 is packaged on one side of an electronic circuit board 4 ; and a pin header 7 , which is an assembly of a plurality of connector pins 6 serving as external connection terminals, is arranged on the back side of the electronic circuit board 4 .
- One side of the pin header 7 is inserted into through holes of the electronic circuit board 4 and is securely fastened by being connected to electrical circuits (not shown in the drawing) such as input and/or output units; and the other side thereof is protruded from an opening portion of the case 2 and is contained in a connector housing 8 .
- the pin header 7 constitutes a connector to be electrically connected to other input and/or output units (not shown in the drawing).
- the electronic circuit board 4 is mounted on the board mounting portion 2 c of the case 2 and is contained.
- a plurality of claws 9 provided in the vicinity of the board mounting portion 2 c of the case 2 is for fixing a peripheral edge portion 4 a of the electronic circuit board 4 to the board mounting portion 2 c of the case 2 .
- stress generated at the base of the claw 9 is less than the tensile strength of material of which the claw 9 is made.
- a rectangular annular shaped fixing groove 10 which is for filling adhesive is provided in the case frame body 2 b of the case 2 on the rear side of the plurality of claws 9 ; and a peripheral edge portion 3 a of the base 3 is fitted into the fixing groove 10 .
- a cutout 11 is provided at a portion corresponding to the rear side of the plurality of claws 9 and is communicated with the fixing groove 10 .
- this embodiment 1 shows a case where the bottom surface of the fixing groove 10 and the bottom surface of the cutout 11 are located at the same level position.
- FIG. 4 is a relevant part enlarged sectional view showing the periphery of the electronic circuit board 4 and the claw 9 in a completion state of the electronic control device 100 .
- the electronic circuit board 4 is fixed by the plurality of claws 9 ; and adhesive 12 filled in the fixing groove 10 flows out to the rear side of the plurality of claws 9 through the cutout 11 , and then the adhesive 12 is hardened to suppress the opening of the plurality of claws 9 after assembly of the electronic control device 100 .
- the adhesive 12 remained in the fixing groove 10 is bonded to the peripheral edge portion 3 a of the base 3 to seal the inside of the electronic control device 100 by blocking boundary surfaces.
- the electronic circuit board 4 on which the pin header 7 , the electronic component 5 , and the like are packaged, is inserted into the case frame body 2 b of the case 2 .
- the electronic circuit board 4 opens the claws 9 outward while running up onto a top portion 9 a of the plurality of claws 9 and is mounted on the board mounting portion 2 c of the case 2 by being inserted to the deep side; and the claws 9 opened outward return to the original position, whereby the electronic circuit board 4 is fixed to the case frame body 2 b of the case 2 .
- the adhesive 12 is filled in the fixing groove 10 .
- the adhesive 12 for example, silicone adhesive and the like is used. It doesn't matter whether the type of the adhesive 12 is a liquid type, or a liquid hardening type, or a room temperature hardening type, or a heat hardening type; however, it is desirable that the adhesive 12 has viscosity to such an extent that the proper amount of the adhesive 12 drips from the cutout 11 and flows out to the rear side of the claw 9 during the time until the adhesive 12 is hardened within an assembly process, and has viscosity to such an extent that the adhesive 12 does not flow off from the fixing groove 10 during the time of a general relevant assembling process (referred to as generally intermediate viscosity, a viscosity range of approximately 5 to 200 Pa ⁇ s).
- the base 3 After filling the adhesive 12 , the base 3 is assembled to the case 2 .
- a bonding surface top portion 3 a 1 of the peripheral edge portion 3 a of the base 3 is fitted into the fixing groove 10 of the case 2 in which the adhesive 12 is filled, whereby the case 2 and the base 3 are bonded via the adhesive 12 .
- the adhesive 12 drips partly from the cutout 11 and flows into the rear side of the claw 9 .
- the adhesive 12 is hardened, whereby the claw 9 is securely fastened.
- the electronic circuit board 4 is fitted to the case 2 and the electronic control device 100 is assembled in a form where the electronic circuit board 4 is sealed by the base 3 .
- the plurality of claws 9 is securely fastened with the adhesive 12 ; thus, even if large external force is applied, the claw 9 is not opened. Therefore, the electronic circuit board 4 is prevented from dropping; thus, the electronic control device 100 excellent in vibration resistance or impact resistance can be obtained as compared to the conventional electronic control device.
- FIG. 5 is a relevant part sectional view showing an electronic control device according to a preferred embodiment 2 and shows an enlarged periphery of an electronic circuit board 4 and a claw 9 .
- the above embodiment 1 shows the structure in which the adhesive 12 filled in the fixing groove 10 flows out to the rear side of the claws 9 through the cutout 11 , and then the adhesive 12 is hardened to suppress the opening of the claws 9 after assembly of the electronic control device 100 ; however, depending on viscosity of the adhesive 12 to be filled, and more particularly, when the viscosity of the adhesive 12 is low, there is a possibility that the adhesive 12 flows out before the case 2 and the base 3 are bonded and bonding and sealing cannot be performed well.
- a protrusion portion 13 is provided on a cutout 11 which is communicated with a fixing groove 10 . It is characterized in that the protrusion portion 13 has a height equal to or higher than the position of a bonding surface top portion 3 a 1 of a peripheral edge portion 3 a of a base 3 , in consideration of dimensional variation, with respect to the bonding surface top portion 3 a 1 of the peripheral edge portion 3 a of the base 3 in the display direction of FIG. 5 at a position in a state where the base 3 is bonded to the case 2 .
- FIG. 6 is a perspective view showing a case in an electronic control device according to a preferred embodiment 3.
- FIG. 7 is a relevant part sectional view showing the electronic control device according to the embodiment 3.
- All the methods of fixing the electronic circuit board 4 shown in the above respective embodiments are designed to hold the outer periphery of the electronic circuit board 4 .
- it goes without saying that it is effective for improvement in resonance point, that is, improvement in vibration resistance of the electronic circuit board 4 by providing a fixing structure also in the vicinity of the central portion of the electronic circuit board 4 .
- a fixing structure is provided in the vicinity of the central portion of an electronic circuit board 4 in addition to the fixing structure on the outer periphery of the electronic circuit board 4 shown in the above each embodiment.
- a hook structure 14 provided in a projecting condition toward the electronic circuit board 4 side is provided in the vicinity of the central portion of a case base body 2 a of a case 2 , an engagement hole 15 is provided at a position where the hook structure 14 of the electronic circuit board 4 intersects and passes through, and the engagement hole 15 of the electronic circuit board 4 is close-fitted onto the hook structure 14 , thereby fixing the vicinity of the central portion of the electronic circuit board 4 .
- the present application is suitable to actualize an electronic control device capable of improving vibration resistance.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Casings For Electric Apparatus (AREA)
- Connection Or Junction Boxes (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
Description
- The present application relates to an electronic control device.
- An electronic control device used for control of a vehicle and the like is of a structure in which electronic components, such as an input and/or output circuit, a communication circuit, a microcomputer, and a power source circuit, are generally arranged on a printed board serving as an electronic circuit board, connectors for being connected to external devices are placed on the printed board, and this printed board is contained in a housing.
- Then, as this electronic control device, there is known one in which the printed board is sandwiched by means of a base and a cover, which are separated above and below, and the butt surfaces of the base and the cover are bonded by waterproof sealant and the like.
- In the electronic control device configured by such an upper and lower separation type housing composed of the cover, the base, and the like, there is generally used a method in which bosses, each formed with a screw hole, are provided on either one of the cover side or the base side and the printed board is rigidly connected to the housing by screw-fastening the printed board to the screw holes to secure vibration resistance.
- Furthermore, in an electronic control device used for a use which does not so require vibration resistance, there is sometimes used a method which fixes the printed board to the housing by means of claws provided on either one side of the housing.
- [Patent document 1] JP,6584547,B
- [Patent document 2] JP,5744092,B
- For the above conventional electronic control device, although the former screw-fastening method can secure high vibration resistance as the device by rigidly connecting the printed board to the housing with screws, the screw holes need to be provided in the housing and thus it becomes expensive. Specifically, a problem exists in that screws for fastening the board and a screw-fastening process are needed, and in addition, female screws need to be formed in a fastening portion in some way, for example, a tapping process is added when the housing is made of metal and insert nuts and the like are inserted and simultaneously formed when the housing is made of resin.
- Furthermore, in recent years, a choice, such as a tapping screw, has been enriched and thus the formation of the female screws is not necessarily essential for both metal housing and resin housing; however, the screws themselves remain and accordingly it is an insoluble problem that the effect on cost becomes large due to, in particular, an increase of the number of screws.
- For the latter claw-fixing method, additional parts such as screws or processes such as tapping need not to be added and the printed board can be easily fixed; on the other hand, securement of vibration resistance is a problem. Structurally, the printed board is close-fitted by elastically deforming a claw portion; and if external force enough to elastically deform the claw portion (vibration, dropping impact, etc.) is applied, there is a possibility that the claw is opened and the printed board is unfastened. In particular, the securement of vibration resistance is a large problem for the electronic control device mounted in the vicinity of an engine.
- The present application is to disclose a technique for solving the problem mentioned above and is to provide an electronic control device capable of surely fixing an electronic circuit board and improving vibration resistance.
- An electronic control device disclosed in the present application is an electronic control device which includes: an electronic circuit board on which an electronic component is packaged; and a housing in which the electronic circuit board is contained, and which is composed of a case and a base. The electronic control device includes: a plurality of claws which is provided on the case of the housing and fixes the electronic circuit board; a fixing groove which is formed in the case on the rear side of the claws, and into which a peripheral edge portion of the base is close-fitted; a cutout which is formed on the rear side of the claws of the housing and is communicated with the fixing groove; and adhesive which is filled on the rear side of the claws via the fixing groove and the cutout.
- According to the electronic control device disclosed in the present application, the electronic circuit board can be surely fixed by the plurality of claws and vibration resistance can be improved.
- The foregoing and other objects, features, aspects and advantages of the present application will become more apparent from the following detailed description of the present application when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a perspective view showing an electronic control device according to a preferred embodiment 1; -
FIG. 2 is an exploded perspective view showing the electronic control device according to the embodiment 1; -
FIG. 3 is a perspective view showing a part A ofFIG. 2 in the electronic control device according to the embodiment 1; -
FIG. 4 is a relevant part sectional view showing the electronic control device according to the embodiment 1; -
FIG. 5 is a relevant part sectional view showing an electronic control device according to apreferred embodiment 2; -
FIG. 6 is a perspective view showing a case in an electronic control device according to apreferred embodiment 3; and -
FIG. 7 is a relevant part sectional view showing the electronic control device according to theembodiment 3. - Hereinafter, a preferred embodiment 1 of the present application will be described on the basis of
FIG. 1 toFIG. 4 . Then, in each of the drawings, identical or equivalent members and portions will be described with the same reference numerals (and letters) assigned thereto.FIG. 1 is a perspective view showing an electronic control device according to the embodiment 1.FIG. 2 is an exploded perspective view showing the electronic control device according to the embodiment 1.FIG. 3 is a perspective view showing a part A ofFIG. 2 in the electronic control device according to the embodiment 1.FIG. 4 is a relevant part sectional view showing the electronic control device according to the embodiment 1. - An
electronic control device 100 is mounted on, for example, an engine of an engine room. A housing 1 is composed of acase 2 and abase 3 and is of an upper and lower separation type. Thecase 2 of the housing 1 is composed of acase base body 2 a, acase frame body 2 b, and aboard mounting portion 2 c. Thecase 2 is formed of, for example, polybutylene terephthalate (PBT) resin; and thebase 3 is formed of, for example, aluminum, stainless steel, and PBT resin. - An
electronic component 5 is packaged on one side of anelectronic circuit board 4; and apin header 7, which is an assembly of a plurality ofconnector pins 6 serving as external connection terminals, is arranged on the back side of theelectronic circuit board 4. One side of thepin header 7 is inserted into through holes of theelectronic circuit board 4 and is securely fastened by being connected to electrical circuits (not shown in the drawing) such as input and/or output units; and the other side thereof is protruded from an opening portion of thecase 2 and is contained in aconnector housing 8. Then, thepin header 7 constitutes a connector to be electrically connected to other input and/or output units (not shown in the drawing). - The
electronic circuit board 4 is mounted on theboard mounting portion 2 c of thecase 2 and is contained. A plurality ofclaws 9 provided in the vicinity of theboard mounting portion 2 c of thecase 2 is for fixing aperipheral edge portion 4 a of theelectronic circuit board 4 to theboard mounting portion 2 c of thecase 2. Incidentally, in a state where theclaw 9 is deformed in an opening direction, it is desirable that stress generated at the base of theclaw 9 is less than the tensile strength of material of which theclaw 9 is made. - Furthermore, a rectangular annular
shaped fixing groove 10 which is for filling adhesive is provided in thecase frame body 2 b of thecase 2 on the rear side of the plurality ofclaws 9; and aperipheral edge portion 3 a of thebase 3 is fitted into thefixing groove 10. Acutout 11 is provided at a portion corresponding to the rear side of the plurality ofclaws 9 and is communicated with thefixing groove 10. For example, this embodiment 1 shows a case where the bottom surface of thefixing groove 10 and the bottom surface of thecutout 11 are located at the same level position. -
FIG. 4 is a relevant part enlarged sectional view showing the periphery of theelectronic circuit board 4 and theclaw 9 in a completion state of theelectronic control device 100. Theelectronic circuit board 4 is fixed by the plurality ofclaws 9; and adhesive 12 filled in thefixing groove 10 flows out to the rear side of the plurality ofclaws 9 through thecutout 11, and then theadhesive 12 is hardened to suppress the opening of the plurality ofclaws 9 after assembly of theelectronic control device 100. Furthermore, the adhesive 12 remained in thefixing groove 10 is bonded to theperipheral edge portion 3 a of thebase 3 to seal the inside of theelectronic control device 100 by blocking boundary surfaces. - Next, assembly procedure of the
electronic control device 100 in the embodiment 1 will be described while referring toFIG. 2 toFIG. 4 . - The
electronic circuit board 4 on which thepin header 7, theelectronic component 5, and the like are packaged, is inserted into thecase frame body 2 b of thecase 2. At this time, theelectronic circuit board 4 opens theclaws 9 outward while running up onto atop portion 9a of the plurality ofclaws 9 and is mounted on theboard mounting portion 2 c of thecase 2 by being inserted to the deep side; and theclaws 9 opened outward return to the original position, whereby theelectronic circuit board 4 is fixed to thecase frame body 2 b of thecase 2. - Next, the
adhesive 12 is filled in thefixing groove 10. As theadhesive 12, for example, silicone adhesive and the like is used. It doesn't matter whether the type of theadhesive 12 is a liquid type, or a liquid hardening type, or a room temperature hardening type, or a heat hardening type; however, it is desirable that theadhesive 12 has viscosity to such an extent that the proper amount of the adhesive 12 drips from thecutout 11 and flows out to the rear side of theclaw 9 during the time until theadhesive 12 is hardened within an assembly process, and has viscosity to such an extent that theadhesive 12 does not flow off from thefixing groove 10 during the time of a general relevant assembling process (referred to as generally intermediate viscosity, a viscosity range of approximately 5 to 200 Pa·s). - After filling the
adhesive 12, thebase 3 is assembled to thecase 2. A bondingsurface top portion 3 a 1 of theperipheral edge portion 3 a of thebase 3 is fitted into thefixing groove 10 of thecase 2 in which theadhesive 12 is filled, whereby thecase 2 and thebase 3 are bonded via theadhesive 12. - In the meantime, the adhesive 12 drips partly from the
cutout 11 and flows into the rear side of theclaw 9. At this time, the adhesive 12 is hardened, whereby theclaw 9 is securely fastened. - As a result, the
electronic circuit board 4 is fitted to thecase 2 and theelectronic control device 100 is assembled in a form where theelectronic circuit board 4 is sealed by thebase 3. - In the electronic control device using fixing means of the electronic circuit board by the plurality of claws, and in the conventional electronic control device in which the plurality of claws is not securely fastened, when external force (vibration, dropping impact, etc.) enough to elastically deform the claw is applied, there is a possibility that the claw is opened and the electronic circuit board is unfastened.
- In the
electronic control device 100 according to the present application, the plurality ofclaws 9 is securely fastened with the adhesive 12; thus, even if large external force is applied, theclaw 9 is not opened. Therefore, theelectronic circuit board 4 is prevented from dropping; thus, theelectronic control device 100 excellent in vibration resistance or impact resistance can be obtained as compared to the conventional electronic control device. - Incidentally, in this embodiment 1, as an example, the description has been made on the
electronic control device 100 of a structure which is provided with theconnector housing 8 having thepin header 7 on theelectronic circuit board 4 side and the opening portion through which terminals protrude on thecase 2 side, and which constitutes the connector by integrating them into one body; however, needless to say, the configuration of the present application can be applied to both cases where the entire connector is configured on theelectronic circuit board 4 side and is configured on the case side, and the same effect can be exhibited. -
FIG. 5 is a relevant part sectional view showing an electronic control device according to apreferred embodiment 2 and shows an enlarged periphery of anelectronic circuit board 4 and aclaw 9. - The above embodiment 1 shows the structure in which the adhesive 12 filled in the fixing
groove 10 flows out to the rear side of theclaws 9 through thecutout 11, and then the adhesive 12 is hardened to suppress the opening of theclaws 9 after assembly of theelectronic control device 100; however, depending on viscosity of the adhesive 12 to be filled, and more particularly, when the viscosity of the adhesive 12 is low, there is a possibility that the adhesive 12 flows out before thecase 2 and thebase 3 are bonded and bonding and sealing cannot be performed well. - So, in this
embodiment 2, aprotrusion portion 13 is provided on acutout 11 which is communicated with a fixinggroove 10. It is characterized in that theprotrusion portion 13 has a height equal to or higher than the position of a bondingsurface top portion 3 a 1 of aperipheral edge portion 3 a of abase 3, in consideration of dimensional variation, with respect to the bondingsurface top portion 3 a 1 of theperipheral edge portion 3 a of thebase 3 in the display direction ofFIG. 5 at a position in a state where thebase 3 is bonded to thecase 2. - With this configuration, even if the maximum amount of the adhesive 12, which is filled in the fixing
groove 10, flows out from thecutout 11 to the rear side of theclaw 9, the adhesive 12 at a portion lower than the height of theprotrusion portion 13 remains in the fixinggroove 10 and comes in contact with the bondingsurface top portion 3 a 1 of theperipheral edge portion 3 a of thebase 3, whereby bonding and sealing can be surely performed. -
FIG. 6 is a perspective view showing a case in an electronic control device according to apreferred embodiment 3.FIG. 7 is a relevant part sectional view showing the electronic control device according to theembodiment 3. - All the methods of fixing the
electronic circuit board 4 shown in the above respective embodiments are designed to hold the outer periphery of theelectronic circuit board 4. However, more particularly, when the size of theelectronic circuit board 4 is large, it goes without saying that it is effective for improvement in resonance point, that is, improvement in vibration resistance of theelectronic circuit board 4 by providing a fixing structure also in the vicinity of the central portion of theelectronic circuit board 4. - So, in this
embodiment 3, a fixing structure is provided in the vicinity of the central portion of anelectronic circuit board 4 in addition to the fixing structure on the outer periphery of theelectronic circuit board 4 shown in the above each embodiment. Ahook structure 14 provided in a projecting condition toward theelectronic circuit board 4 side is provided in the vicinity of the central portion of acase base body 2 a of acase 2, anengagement hole 15 is provided at a position where thehook structure 14 of theelectronic circuit board 4 intersects and passes through, and theengagement hole 15 of theelectronic circuit board 4 is close-fitted onto thehook structure 14, thereby fixing the vicinity of the central portion of theelectronic circuit board 4. - As for the engagement of the
hook structure 14 with theengagement hole 15, as shown inFIG. 7 , when theengagement hole 15 of theelectronic circuit board 4 is going to be close-fitted onto a pair ofhooks hook structure 14, atop portion 14 a 1,14 a 1 of the pair ofhook engagement hole 15 of theelectronic circuit board 4 is completely fitted, thetop portion 14 a 1,14 a 1 of thehook electronic circuit board 4. - This can improve the resonance point of the
electronic circuit board 4; and consequently, the vibration resistance of the electronic control device can be further improved. - The present application describes various exemplified embodiments and examples; however, various features, aspects, and functions described in one or a plurality of embodiments are not limited to specific embodiments, but are applicable to embodiments individually or in various combinations thereof. Therefore, countless modified examples not exemplified are assumed in technical ranges disclosed in the specification of the present application. For example, there include: a case in which at least one constituent element is modified; a case, added; or a case, omitted; and a case in which at least one constituent element is extracted to combine with constituent elements of other embodiments.
- The present application is suitable to actualize an electronic control device capable of improving vibration resistance.
- Various modifications and alternations of this application will be apparent to those skilled in the art without departing from the scope and spirit of this application, and it should be understood that this is not limited to the illustrative embodiments set forth herein.
Claims (16)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2021056748A JP7068521B1 (en) | 2021-03-30 | 2021-03-30 | Electronic control device |
JP2021-056748 | 2021-03-30 |
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US20220322541A1 true US20220322541A1 (en) | 2022-10-06 |
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US17/365,455 Pending US20220322541A1 (en) | 2021-03-30 | 2021-07-01 | Electronic control device |
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Citations (7)
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US20120320544A1 (en) * | 2011-06-17 | 2012-12-20 | Hitachi Automotive Ststems, Ltd. | Electrical control unit |
US20140285985A1 (en) * | 2013-03-22 | 2014-09-25 | Mitsubish Electric Corporation | Electronic control device and method of manufacturing electronic control device |
JP2014187062A (en) * | 2013-03-21 | 2014-10-02 | Hitachi Automotive Systems Ltd | Electronic controller |
US20140307399A1 (en) * | 2011-11-10 | 2014-10-16 | Mitsubishi Electric Corporation | Electronic controller |
US20180192526A1 (en) * | 2015-06-30 | 2018-07-05 | Meidensha Corporation | Electronic control device |
US20190380220A1 (en) * | 2018-06-11 | 2019-12-12 | Mitsubishi Electric Corporation | Waterproof electronic device and production method of waterproof electronic device |
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JPH01176986U (en) * | 1988-05-31 | 1989-12-18 | ||
JPH1070381A (en) * | 1996-08-27 | 1998-03-10 | Yazaki Corp | Securing structure for wiring board |
US9363914B2 (en) * | 2012-07-13 | 2016-06-07 | Mitubishi Electric Corporation | Semiconductor device |
US10206295B2 (en) * | 2016-08-19 | 2019-02-12 | Flextronics Ap, Llc | Securing a PCB in a plastic and metal housing |
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US20120320544A1 (en) * | 2011-06-17 | 2012-12-20 | Hitachi Automotive Ststems, Ltd. | Electrical control unit |
US20140307399A1 (en) * | 2011-11-10 | 2014-10-16 | Mitsubishi Electric Corporation | Electronic controller |
JP2014187062A (en) * | 2013-03-21 | 2014-10-02 | Hitachi Automotive Systems Ltd | Electronic controller |
US20140285985A1 (en) * | 2013-03-22 | 2014-09-25 | Mitsubish Electric Corporation | Electronic control device and method of manufacturing electronic control device |
US20180192526A1 (en) * | 2015-06-30 | 2018-07-05 | Meidensha Corporation | Electronic control device |
US20200216050A1 (en) * | 2017-08-23 | 2020-07-09 | Advics Co., Ltd. | Liquid pressure control device and method for manufacturing same |
US20190380220A1 (en) * | 2018-06-11 | 2019-12-12 | Mitsubishi Electric Corporation | Waterproof electronic device and production method of waterproof electronic device |
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JP2022153955A (en) | 2022-10-13 |
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